CartoDB

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OruxMaps

MapTiler Cloud is a cloud-based mapping platform that provides tools for creating, hosting, and serving custom maps and geospatial data. It offers a range of features and services that allow users to publish maps on the web or integrate them into their applications.

QGIS is a free and open-source software that can be used access planetary imagery and geospatial data. The platform is openly developed and released under the GNU GPLv2. With QGIS, users can view, edit and analyse geospatial data cross-platform, for Android, macOS, Linux and Windows.

Mapbox Studio is a suite of applications for designing custom map styles and managing your location data with Mapbox. You can use Mapbox Studio to build and design a map to your exact specifications by uploading and editing your own data, utilizing Mapbox-provided tilesets, adding custom fonts and icons, or refining the built-in core styles.

An open source mapping platform with that can be used for software projects. Mapbox provides and APIs and SKDs to integrate location into any mobile or web application. Companies like Foursquare, Lonely Planet, Facebook, Financial Times, The Weather Channel and Snapchat utilize Mapbox to create custom maps for their applications.

OpenStreetMap is free and open-source community-driven project to create editable maps for the world. The project provides data geolocation data about roads, trails, businesses, railway stations, air ports and much more. The data provided by the community and OpenStreetMap is free to use for any software project that requires maps, as long as you credit the project and its contributors.

With PocketMaps, you can store free offline map on your android device. The project is free and open-source and uses OSM data, Mapsforge-vtm and Graphhopper open source API.